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My Roland KR 650 digital piano, amplifier has a load hum and will not play.

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Are all smd defective?

Posted on Mar 30, 2012

  • gaspbut Mar 30, 2012

    I have the same problem

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Smd elkos on the mainboard is defective 10uF16V and 3,3uF types

Posted on Sep 03, 2010

  • gaspbut Mar 30, 2012

    I have the same problem. Are all smd defective?

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1 Answer

How do I fix a Roland Digital Piano FP-8 that has refused to play sounds despite the fact that it displays lights?


If everything lights up and responds to button pushes like normal, and you've done a hard reset as described in the manual, check to see if you have sound out of the headphone jack. It's most likely not a user serviceable problem and will need to go to the shop, but it will probably be the output amp rather than the main board.

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I have a Technics PR-305 Digital Piano. I was playing a couple of songs on it., then about 5 days later. around the beginning of November I went to turn it on it made a loud humming sound from the sp


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How do I connect my roland piano 5500 to an amp


On the rear of the piano there will be two 1/4" jacks labeled Output Left and Right. One will be labled Mono as well. If you are using a stereo amp, use both, and if a mono amp use just the mono output. If your amp is a guitar type, connect a shielded cable with 1/4" phone jacks such as you'd use with an electric guitar from these jacks to your amplifier. If you are useing a home stereo amp, you will need a cable with 1/4" phone jacks from the piano to RCA phono jacks on the amp end.

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I have a Roland KR 4500 Digital Piano and I brought it to the local authorized Roland Service Center here in the Detroit area. Apparently the capacitors on the motherboard leaked and the board is tot


You can sometimes clean up the board with a cotton swab and some alcohol. Trace the lines for continuity with a multimeter making sure there are no breaks. Get the information on the capacitors and buy them at an electronic parts store. Replace them or have a professional do it. If all fails, sell it for parts.

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I have a Roland FP 1 digital piano, serial #AL21141N. It has gradually quit putting out sound through the speakers. At the onset of the problem, I could fit it by jiggling the 1/4" speaker plugs,...


I first would suspect the switches on the eadphone jack. Normally these cut off the speakers when headphones are plugged in. These jacks and the switches are really weak, poorly made, and easily broken, especially if headphone cord gets yanked.

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How to remove piano keys from Roland KR 4700


You probably need to just clean the circuit board and the conductive rubber contacts. There are two per key to facilitate reading the key velocity.

Use 99% isoprophyl alcohol and Q-Tips to clean both the board and the rubber contacts.

A rod is inserted lengthwise to hold the hammer weights while removing the boards. Use dowels from each end inserted about halfway back between the keys and the weight rods. Use a 1/4 inch dowel rod.

You have to take out a few screws to remove the boards from the key assembly. Be careful of the cables.

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I have a Roland HP 2e digital piano - Foot pedal problem


The ROLAND pianos USUALLY require that you use a normally closed sustain pedal.

MANY pedals are the opposite and close when pressed. SOMETIMES you can open the pedal and reverse the way the switch works.

Oct 05, 2009 | Roland Music

1 Answer

Need a manual


To download manuals Roland requires you to register. Go to:

http://backstage.rolandus.com/login.php

Create a new profile, then login to download the manual you need.

Thanks for using Fixya.

Apr 16, 2009 | Computers & Internet

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